Abstract: The technical line of combining laboratory experiment and manufacturing enterprise probation, the optimization of material and rational production process parameter were used, to produce a grinding aid of low cost and low mixed quantity, which was made from a great variety of chemical products at low temperature. The result of probation indicated grinding aid showed excellent property in the optimization of cement grain composition. The grain less than 30m was about 80 percent, and its optimum dose was between 0.009% to 0.015%. Dose fluctuation of grinding aid had a little effect on performance index of cement when mixed quantity was about 0.012%, which made the production control convenient.